A work vehicle includes an engine, a post-processing device, and a cooling fan. The engine is mounted on a front portion of a travelling machine body. The post-processing device purifies exhaust gas of the engine. The cooling fan water-cools the engine. The cooling fan is located in front of the engine. The cooling fan, the engine, and the post-processing device are covered with a hood. The hood includes a shield. The shield covers a lower section of the post-processing device and one side of the engine. The shield is a perforated plate including a plurality of holes.

An exhaust manifold includes an inner assembly that defines an exhaust gas passage and an outer housing assembly that surrounds the inner assembly. The outer housing assembly includes a first housing component configured for attachment to an engine and a second housing component configured for attachment to a turbocharger. The first and second housing components cooperate to surround the inner assembly. At least one fastener secures the first and second housing components together to generate a compressive force that seals and holds the inner assembly in a gas tight manner.

Methods and systems are provided for a 2-port integrated exhaust manifold for an inline-3, inline-6, V-6, and/or V-12 engine. In one example, a system may include an exhaust manifold integrated within a cylinder head of an engine block. The integrated exhaust manifold may include a first set of two runners from a first outer cylinder coupled to a first manifold exhaust port, a second set of two runners of a second outer cylinder coupled to a second manifold exhaust port, and one runner of an inner cylinder coupled to the first manifold exhaust port and another runner of the inner cylinder coupled to the second manifold exhaust port.

Disclosed herein is an exhaust insulator structure for a multi-cylinder engine of a vehicle. The structure includes an exhaust manifold, an exhaust gas purifier, and a heat insulator. The engine is able to switch its mode of operation from an all-cylinder operation in which all of four cylinders thereof are activated to a cylinder-cutoff operation in which two of the four cylinders are deactivated to serve as idle cylinders and the other two cylinders are activated to serve as active cylinders, or vice versa. The exhaust manifold includes: idle-cylinder-connected branched exhaust piping communicating with the idle cylinders; and active-cylinder-connected branched exhaust piping communicating with the active cylinders. A portion of the heat insulator facing the active-cylinder-connected branched exhaust piping has an opening that lets air blowing against the vehicle traveling into the heat insulator.

Operating an engine system includes feeding a flow of exhaust to a turbine in a turbocharger, receiving a load step request, and increasing a speed of rotation of the turbocharger based on an increase in a fueling rate initiated in response to the load step request. Operating the engine system further includes limiting dissipation of heat energy of the flow of exhaust to the turbine to hasten an increase in the speed of rotation of the turbocharger, and increasing dissipation of heat energy from the flow of exhaust after satisfaction of the load step request. Varying of the dissipation of heat energy can be achieved by displacing an insulating fluid in the exhaust manifold with a heat exchange fluid such as water and/or engine coolant.

An apparatus for shielding hot regions, in particular of an internal combustion engine, includes a heat shield with a through hole. The apparatus has a component, in particular a heat source, with a fastening region which has a receptacle and a shoulder which surrounds the receptacle at least partially. The shoulder extends through the through hole of the heat shield. The apparatus has a fastening element, in particular a screw, which fastens the heat shield to the fastening region, the fastening element being supported on the shoulder, extending through the through hole of the heat shield, and being fastened in the receptacle.

A decoupling element for reducing structure-borne noise, particularly for use in a heat shield system, having a sleeve element with an insertion opening for the insertion of a fastener for fastening to a partner fastener, wherein the insertion opening extends in an axial direction of the sleeve element and the sleeve element has collars protruding in a radial direction, which are spaced apart from each other in the axial direction, wherein between the collars, a damping element is positioned, which extends radially outward beyond the collars and is provided to be fastened to a heat-shielding part by means of a fastening element, and the damping element is embodied as a metal wire structure, wherein the damping element is positioned so that it is elastically prestressed in the axial direction in a gap between the collars of the sleeve element.

Systems for an integrated exhaust manifold cylinder head are provided. In one example, an exhaust manifold for a vehicle includes a plurality of exhaust runners coupling a plurality of cylinder exhaust gas outlet ports to an exhaust exit port, the plurality of exhaust runners forming at least a first exhaust passage and a second exhaust passage at the exhaust exit port; an upper cooling jacket positioned vertically above the first exhaust passage; a lower cooling jacket positioned vertically below the second exhaust passage; and a central cooling jacket positioned vertically below the first exhaust passage and vertically above the second passage.

A connector including: a first buffer member that includes a spiral-shaped wire in a plan view; a second buffer member that has a substantially annular and flat plate-like shape, and that is capable of warping in a thickness direction; a collar member that includes a cylindrical portion surrounded by the first buffer member and the second buffer member, a first flange facing a radially inner side of the first buffer member, and a second flange facing a radially inner side of the second buffer member; and a coupling member that includes a first holder section holding radially outer sides of the first buffer member and the second buffer member, a second holder section holding the shielding body, and a coupling member base portion.

The disclosure relates to a cylinder head for covering a combustion chamber of an internal combustion engine. The cylinder head comprises at least one material recess for heat isolation, which is formed in a main body of the cylinder head and is arranged between a fluid-guide channel and a cooling channel. The material recess can be produced e.g. directly during the shaping (e.g. casting or pressing) of the cylinder head and/or thereafter. For example, in the event that exhaust gas is guided through the fluid-guide channel, a significantly lower heat input occurs from the hot exhaust gas into the cooling fluid. In addition, the thermal decoupling via the material recess leads to the hot exhaust gas cooling to a lesser degree in the fluid-guide channel.